# frozen_string_literal: true class RemoveInvalidUnconfirmedEmails < ActiveRecord::Migration[4.2] class User < ApplicationRecord end def up User.joins("INNER JOIN users as valid_user ON users.unconfirmed_email = valid_user.email") .where("users.id != valid_user.id").update_all(unconfirmed_email: nil, confirm_email_token: nil) end end